Premium
Influence of structure of hydroxyl‐terminated maleopimaric acid ester on thermal stability of rigid polyurethane foams
Author(s) -
Zhang Y.,
Shang S.,
Zhang X.,
Wang D.,
Hourston D. J.
Publication year - 1995
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1995.070581019
Subject(s) - rosin , thermogravimetric analysis , polyurethane , thermal stability , polyol , materials science , isocyanate , polymer chemistry , resin acid , degradation (telecommunications) , composite material , chemistry , organic chemistry , telecommunications , computer science
A series of hydroxyl‐terminated maleopimaric acid esters (HTMAEs) and rigid polyurethane (PU) foams based on these HTMAEs were synthesized using chemically modified natural gum rosin and its derivative maleopimaric acid as raw materials. Thermal stability of these polyols and their corresponding rigid PU foams was studied by a thermogravimetric method and a dimensional stability measurement. It was shown that the thermal stability of the final foams was strongly dependent on the structure of their corresponding polyols. The thermogravimetric analysis curves of these rosin‐based rigid PU foams displayed two distinct regions of weight loss. It has been shown that at the initial stage of weight loss the process was dominated by polyol component degradation; the second stage was governed by isocyanate component degradation. © 1995 John Wiley & Sons, Inc.